IOReturn IOWorkLoop::_maintRequest(void *inC, void *inD, void *, void *)
{
maintCommandEnum command = (maintCommandEnum) (uintptr_t) inC;
IOEventSource *inEvent = (IOEventSource *) inD;
IOReturn res = kIOReturnSuccess;
switch (command)
{
case mAddEvent:
if (!inEvent->getWorkLoop()) {
SETP(&fFlags, kLoopRestart);
inEvent->retain();
inEvent->setWorkLoop(this);
inEvent->setNext(0);
if (!eventChain)
eventChain = inEvent;
else {
IOEventSource *event, *next;
for (event = eventChain; (next = event->getNext()); event = next)
;
event->setNext(inEvent);
}
}
break;
case mRemoveEvent:
if (inEvent->getWorkLoop()) {
if (eventChain == inEvent)
eventChain = inEvent->getNext();
else {
IOEventSource *event, *next;
event = eventChain;
while ((next = event->getNext()) && next != inEvent)
event = next;
if (!next) {
res = kIOReturnBadArgument;
break;
}
event->setNext(inEvent->getNext());
}
inEvent->setWorkLoop(0);
inEvent->setNext(0);
inEvent->release();
SETP(&fFlags, kLoopRestart);
}
break;
default:
return kIOReturnUnsupported;
}
return res;
}
IOReturn IOWorkLoop::_maintRequest(void *inC, void *inD, void *, void *)
{
maintCommandEnum command = (maintCommandEnum) (uintptr_t) inC;
IOEventSource *inEvent = (IOEventSource *) inD;
IOReturn res = kIOReturnSuccess;
switch (command)
{
case mAddEvent:
if (!inEvent->getWorkLoop()) {
SETP(&fFlags, kLoopRestart);
inEvent->retain();
inEvent->setWorkLoop(this);
inEvent->setNext(0);
/* Check if this is a passive or active event source being added */
if (eventSourcePerformsWork(inEvent)) {
if (!eventChain)
eventChain = inEvent;
else {
IOEventSource *event, *next;
for (event = eventChain; (next = event->getNext()); event = next)
;
event->setNext(inEvent);
}
}
else {
if (!passiveEventChain)
passiveEventChain = inEvent;
else {
IOEventSource *event, *next;
for (event = passiveEventChain; (next = event->getNext()); event = next)
;
event->setNext(inEvent);
}
}
IOStatisticsAttachEventSource();
}
break;
case mRemoveEvent:
if (inEvent->getWorkLoop()) {
IOStatisticsDetachEventSource();
if (eventSourcePerformsWork(inEvent)) {
if (eventChain == inEvent)
eventChain = inEvent->getNext();
else {
IOEventSource *event, *next;
event = eventChain;
while ((next = event->getNext()) && next != inEvent)
event = next;
if (!next) {
res = kIOReturnBadArgument;
break;
}
event->setNext(inEvent->getNext());
}
}
else {
if (passiveEventChain == inEvent)
passiveEventChain = inEvent->getNext();
else {
IOEventSource *event, *next;
event = passiveEventChain;
while ((next = event->getNext()) && next != inEvent)
event = next;
if (!next) {
res = kIOReturnBadArgument;
break;
}
event->setNext(inEvent->getNext());
}
}
inEvent->setWorkLoop(0);
inEvent->setNext(0);
inEvent->release();
SETP(&fFlags, kLoopRestart);
}
break;
default:
return kIOReturnUnsupported;
}
return res;
}